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Rear Axle Assembly

A project log for Woody the Electric Four Passenger Bicycle

Woody is a scratch built quad wheel bicycle with four passenger capacity, with electric power to assist pedaling.

john-guyJohn Guy 08/10/2023 at 22:090 Comments

The rear axle assembly was tack welded and checked for alignment. I used 5/8" square tubing in side the 3/4" 16ga. tubing to make slip joints. I mounted the wheel, and bolted 6 foot boards to each tire and set toe in to 0. I then tack welded the slip joints. Hopefully this stays in alignment!

I set the rear aside and moved to the front section. To get the bends right I printed out the design at 1:1 scale, and glue-sticked it to a piece of plywood. 

The head tubes were aligned at the right angle, and thoroughly braced into place, and the rear assembly is mounted to the table with annealed wire and wood screws. Wooden blocks of the right dimension hold the rear assembly at the correct elevations with respect to the front tubes.

Turns out my ability to do compound bends is terrible. All these front tubes have a splice somewhere

With all the major alignment pieces at least tack welded, the frame is removed from the table

 Prior to removing from the table, a pair of pivots are added at the front and back to facilitate welding and painting. These may be removed later, but I am not sure at this time.

The flat table is now removed from the stand, and Woody's frame is bolted to the stand. The stand base length was shortened by 16" to accommodate the mounting pivots. I can now get to all the joints to complete the welding.

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